Alert archive / Maine / Frost Advisories in 2017
Frost Advisory 1, NWS Gray, ME
NWS Gray, ME issued this frost advisory at May 20, 2017, 3:27 AM EDT for 5 counties in Maine; Carroll County, Grafton County, Strafford County, New Hampshire. It took effect at May 21, 2017, 2:00 AM EDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- May 20, 2017, 3:27 AM EDT (07:27 UTC)
- In effect from
- May 21, 2017, 2:00 AM EDT
- Expired
- May 21, 2017, 7:31 AM EDT
- In force
- 6 hr
- Issued by
- NWS Gray, ME
Counties Androscoggin County, ME, Cumberland County, ME, Franklin County, ME, Somerset County, ME, York County, ME, Carroll County, NH, Grafton County, NH, Strafford County, NH
The radar
The Portland,ME radar (KGYX), 44 km from the middle of the area, began a volume at 07:27 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Albany, NY (KALY), launched 00:00Z, 7.5 hours before the alert went out and 298 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1156 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- -76 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Gray, ME wrote its last area forecast discussion before this frost advisory went out at May 19, 6:30 PM EDT, 8 hours 57 minutes earlier.
Area forecast discussion, May 19, 6:30 PM EDT, 8 hours 57 minutes before
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</html>The office that day
Everything else NWS Gray, ME issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 3:16 AM EDT | Beach Hazards Statement | GYX | Cumberland, Knox, Lincoln, Sagadahoc, Waldo, York | 17 hr |
| May 20, 3:27 AM EDT | Freeze Warning | GYX | Franklin, Oxford, Somerset | 28 hr |
Nearby
Frost Advisories in Maine, 2017Frost Advisories in New Hampshire, 2017Every frost advisory in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.